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通过使用西洛电解质添加剂来缓解丰富的多层阴极容量损失.

Yongwei Chen1,2, Xiangzhen Zheng1, Ying Pan1

  • 1Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China.

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概括
此摘要是机器生成的。

1,3-二-1,1,3,3-四甲基二氧化 (DTS) 添加剂稳定了高压离子电池. 它形成了一种保护性阴极电解质接口,改善了丰富的多层氧化物阴极的循环稳定性和容量保留.

关键词:
1,3-二-1,1,3,3-四甲基二甲二氧化.阴极电解质接口接口的介面电解质添加剂是一种电解质添加剂.高能量密度的离子电池.富含的多层氧化物.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 电化学 电化学 电化学
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 电极-电解质接口的不稳定性限制了高能离子电池 (LIB) 的发展.
  • 高压阴极材料需要强大的接口保护,以保持稳定的运行.

研究的目的:

  • 为了研究1,3-二-1,1,3,3-四甲二氧化 (DTS) 作为电解质添加剂的疗效.
  • 为了增强4.8V运行的富含Li的多层氧化物 (LLO) 电池的循环稳定性和容量保留.

主要方法:

  • 预测DTS氧化行为的理论计算.
  • 用DTS添加剂和没有DTS添加剂的LLO电池的电化学测试.
  • 分析阴极电解质接口 (CEI) 的形成和稳定性.

主要成果:

  • DTS在LLO阴极表面上优先氧化,形成一个稳定的CEI.
  • 经过DTS修改的CEI减轻了阴极裂纹,再生和相位过渡.
  • 带有DTS的LLO电池在4.8V的100个循环后显示了85.4%的容量保留 (与基线的45.2%相比).
  • 即使在1000ppm的H2O污染下也观察到DTS增强的稳定性.

结论:

  • DTS是一种有效的电解质添加剂,用于稳定高压LLO阴极.
  • 由DTS形成的强大的CEI显著提高了电池的性能和耐用性.
  • DTS为推进高能量密度LIBs提供了一个有前途的战略.